USGS Body-Wave Moment Tensor Solution

SANTA CRUZ ISLANDS

12/09/05 13:09:08.44

Epicenter: -12.510  166.497
MW 5.9

USGS MOMENT TENSOR SOLUTION
Depth  19         No. of sta: 67
Moment Tensor;   Scale 10**17 Nm
  Mrr=-7.07       Mtt= 0.37
  Mpp= 6.70       Mrt=-3.58
  Mrp=-1.75       Mtp=-5.50
 Principal axes:
  T  Val=  9.89  Plg= 1  Azm=240
  N       -0.44      31      149
  P       -9.45      59      331

Best Double Couple:Mo=9.7*10**17
 NP1:Strike=123 Dip=54 Slip=-130
 NP2:       357     52       -49

Moment Tensor Solution
The figure above shows a visual representation of the style of faulting (focal mechanism) derived from the estimated moment tensor. Shaded areas show quadrants of the focal sphere in which the P-wave first-motions are away from the source, and unshaded areas show quadrants in which the P-wave first-motions are toward the source. The dots represent the axis of maximum compressional strain (in black, called the "P-axis") and the axis of maximum extensional strain (in white, called the "T-axis") resulting from the earthquake.

Moment Tensor Solution